Transformer



June i2, 1925.

F FP.. V.

TRANSFORMER Filed Oct l lJZ @guan/ifo@ /724 Patented June l2, 1923.

yuurreo )STATES PAT ENT OFI-IcaA RBERT V. BINGAY. DE PITTSBURGH, PERNSYLVANIA, ASSIGNOR TO PITTSB'URGH .TRANSEO'RMER COMPANY, A. CCRPORATION 0F PENNSYLVANIA.

TRANSFOZRMER.

Application filed October 1, i920. Serial No. 414,147.

To all 'w'wm it may concern:

Be it known that I, Renner V. Binner, a citizen of the United Statesresiding at Pittsburgh7 in the county of Allegheny and Statel of Pennsylvania have invented certain new and useful mprovements in Trans formera.l ofr which the following is a specilication. i l

This invention relates to electrical transformers and particularly to small oil cooled transformers and tanks eontainingthe same,

immersed in oil. The object of the invention is to provide a transformer structure and tank that will begsi'mple in form and easily made up from standard stock.

ln theaccompa'nying drawings illustrating the inventioni v Fig. l is. a, horizontal sectional view on line l--l of Fig. 2 sliowing'one embodiment of the invention, and

Fig. 2 is ar verticalsectional View on line 2.-2 of Fig. 1.

In the'specific emb'odiment'oftthe invention shown i'n the drawings a transformer R supported ina frame F is contained together with the coolingoil in a tank T. The tank T is made up of sheet steel and is generally circular yin horizontal section with its lupper part 5 enlarged to overhang the lower portion 6 as indica-ted at 7. The lower part 6 of the tank formed by a steel sheet 8 cut to desired size, rolled into simple cylindrical form and welded together at the Imeeting edges as along line `9. The

upper part 5 of the tank is formed by a single steel strip l1 rolled into af circle of larger diameter-than the lower portion 6 and also welded" together at its meeting edges` as at l2. .This upper ring is'assembled eccentrcally on the lower part G, being tangent thereto at 13 and overhanging at the opposite side 7. The upper end of the tank 6 extends. into the ring shaped .piece 15 is fitted in place between the two circles and welded at its edges to both to form the bottom 14 of a. bushing space 16 extending'out over thelower portion of the tank.

Extending into this space 16 are the in.- sulating bushings 17. and 18 for the high tension and` low tension leads respectively and these bushings extend downward through holes 20 inthe bottom piece 14 and are inclined to position their ends away from the body of` the tank. These bush- 5 and a. crescent' ings are firmly set in place in cementitious material 21 poured `into the space 16 and hardened. The top edge 22 of the ring 5 may kbe flanged over as shown for rattachment of the tank cover 23 held by clamps 24.V The bottom 25 of the tank is welded in place at the lower end of the part 6 and the tank is supported preferably by hanging as from a horizontal member m. For this purpose angle bars 26, 27 are bentto lit the tank as sh'wn and welded thereto in position with their lower ends underl thev bottom of the tank. These bars thus'serve also as a base for the tank when standing" on a support. Stra-pmembers 28, 29 are adJustab y bolted to bars 26, 27 and twisted at 30, 31 so that their upper hooked ends will be alined for engagement with the support m. c f

The simple circular formation of this tank makes it easy to build from standard stock by simple bending and weldin steps. There arene complicatedshapes'to eprovided for nor remote corners nor 'diicult operations. The structure is especially strong as it is formed by circular arches reinforced at the top and bottom, lying against the angle irons ,26, 27 directly sup- L porting the transformer frame F which is clamped dow-n against the bottom by tightening of the nuts 35 threaded on rods 36 which are welded to the inside of the tank as at 37.

The frame F is composed of metal strips and angles out from stock t0 fit the inside of the tank T.` The vertical corners of the transformer core 40 are gripped by angle bars 41 fastened to horizontalangle bars 42- at the top and bottom and drawn together to clamp the core by bolts 43 through the ends of bars42. Fastened to the lower angle bars 42 are the stripsf44 forming the base of the frame resting on the bottom of the tank. Passing through the upper angle bars 42 are the angle members 45 provided lf .with holes 46 for the bolts 36 and it is thesel 

